Oil-engine-feeding device.



E. G. HGBART.l

OIL ENGINE FEEDING DEVICE.

APPLICATION FILED MAY 19, 1915.

1,275,426 Patented Aug. 13, 1918,

@ Y E gmx @m F. G. HOBART.

OIL ENGINE FEEDING DEVICE.

APPLlcATloN FILED MAY 19, |915.

1 ,275,426. Patented Aug. 13, 1918.

7 jf 4 SHEETS-SHEET 2.

F. G. HOBART.

OILENGINE FEEDING DEVICE APPL1CAT10N FILED 11111119.1915.

1 ,27 5 ,426 Patented Aug'. 13, 1918,

4 SHEETS-SHEET 3.

W @j @@MWKQM F. G. HOBART.

0|L ENGINE FEEDING DEVICE.

APPLICATION FILED MAY I9. 1915.

1,275,426. Patented Aug. 13, 1918.

4 SHEETS-SHEET 4- k, www 529;,

FRANKLIN e. Horam?, or nnnorr, wisconsin, .assreNon-ro rainnaNKs, mensa a COMPANY, or cmcaeo, Immers, a (Icaro Tron' or Immers.

OIL-ENGINE-FEEDING DEVICE.

To all whom t may concern.'

Be it known that I, FRNKLIN G. Horam', a citizen of the' United States, residing at Beloit, in the .county of Rock and State of Wisconsin, have invented a certain new and f which will be positive, simple, reliableY and of economical manufacture. lt may be stated in eneral in connection with my invention, t at means is provided for forcibly injecting oil or other fuel into a combustion chamber of the engine, and the amount of fuel for each charge is regulated byA means of a valve which controls the port leading to said pump. `Timing mechanism for controlling said valve is provided, said timing mechanism being automatic in its operation and acting in accordance with the speed of `the engine, the result being that l am able' to control to a nicety the amount of fuel supplied to the combustion chamber, and at the same time the fuel is forcibly injected I lnder the necessary pressure. Another ob- ]ect of my invention is to provide simple and eiiicient mechanism for priming the engine preliminary to starting the same. An-

other object is to provide a separate supply pump o erated preferably from the main engine s aft for keeping the 4supply tank supplied with fuel. In the specic design selected to illustrate the invention, the fuel. from the su ply tank feeds to the pumping 4mechanisml oth by gravity and suction.

Specific devices which enter into the mechanism will be referred to more in detail asl the description proceeds.

I accomplish my objects bythe construetion illustrated in the accompanying drawings, in which- Figure 1 is an elevation showing a general assembly view of an internal combustion engine equippedwith mechanism embodying my invention.

Fig. 2 is a plan section taken through the center of the crank shaft and showing the 'pumping peci'eation of Letters Patent. Patented Aug., 13, 1.918. appmaaot mea may 19,1915. serai no. sacas.

mechanism and parts associated therewith. i v

Fig. 3 is a vertical 'section taken on the line 3 3, Fig. 2. l Fig. 1 is a vertical section showing the valves in the supply pump which furnishes fuel to the supply tank.` rlhe plane of secl tion is indicated by the line 1 -4, Fig. 2.-

Fig. 5 is' a side elevation of the timing cam and mechanism by which the same is governed. rlhe plane of sight is indicated by the line 5 5, Fig. 2. Y

Fig. 6 is a detail showing the timing ycam upon the main shaft.

Simllar numerals refer to similar' parts throughout the several views.

Now describing 'the particular design which lhave chosen for the purpose of illustrating the invention, the cylinder 1 is mounted upon a base 2 supporting the main crank shaft 3, which is provided with a iiywheel 4. Fig. 3 of the drawings illustrates it will be understood that the number of cylinders is immaterial.

The fuel supply tank 6 is kept supplied with fuel, the preferred mechanism for accomplishing this being Vhereinafter described. A pipe 7, wh1ch may be termed the fuel inletv pipe leads from tank 6 to a valve `casing 8, as best shown in Fig. 2. A valve seat 9 is formed in said casing and this coperates with the inlet valve l0 which controls the How to the passage 11 leading to the main injection pump resently to be described. Valve 10 is urgetoward closed Aposition by a helical compression spring l2.

Said valve isv attached to a stem 13, which passes up through .the casing 8. in case the fuel should creep up past the lower portion of stem 13 it passes o through a drain 14, best shown in Figs. 1 and 2. Stem 13 'is operated by a push rod 15, provided at its lower end with a screw cap 16, which abuts vthe upper end ofthe valve stem. By screw- ,an engine having but a single cylinder but reo-v ber 70'is a .chamber 72 connected by a duct is normally held open by a spring 80 against aerienne i erative, with the result that the fuel supply to the combustion chamber will be shut off and the engine will come to rest,

lWhile the engine, in starting, may be turned over manually or mechanically, as desired, l prefer to employ the air starting device shown at the top of Fig 2. According' to the design shown, a receiving chamber '70 is supplied with air under pressure through a duct 71 leading from any suitable compressor (not shown). Adjacent to cham- 7 8 to the engine cylinder. The passaoe from chamber 70 to chamber 72 is controlled by a valve 74 mounted upon a stem 75 and cooperating with a valve seat 7 6. Steml 75 leads down through the housing 57 and is acted upon by a cam 7 8 which is here shown to be integral with the pumpin cam 44 rigidly secured to the shaftf. he valve a stop 81. When compressed air is turned on through the duct 71, it closes valve 74 unless the cam 7 Sis in position to hold the valve open. The cam is so constructed as to control the admission; of compressed air to the cylinder above the piston, admitting air at the beginning of the `strolre and closing the valve before the end of the stroke and leaving the valve closed until the piston has again started on. its downward stroke, During this period the engine operates as a compressed air engine, no fuel being introduced. While the engine isrotating under the influence of this compressed air the compressed air is shut oif and the fuel oil feeding mechanism allowed to operate, thereby changing the engine from an air engine to an oil engine.

In operation, as soon as the engine has i been started, and the fuel turned on in duct 7 the injector pump plunger 37 reciprocates under the action of the pumping cam 44.

and forcibly injects fuel into the combustion chamber of the engine. The amount of fuel injected depends upon the' timing of the inlet valve 10 which in turn is controlled by the timing cam 22, the latter being controlled by the engine governor. The governor, which is sensitivein its action, is called upon in my engine to operate onl the inlet valve l0 which requires but ittle power, the power foroperating themain injector pump and the storage supply pump being derived from parts rigidly fastened upon the engine shaft.

Having thus described my invention, what l claim as new land desire to secure by lietters Patent is 1. in an internal combustion engine, the combination, with the engine cylinder, of a shaft rotating in. proportion to the speed of the engine, a cam rigidly secured to said shaft, a pump'having a' plunger for introducing fuel into said cylinder, a slide operated by said cam and abutting the end of said plunger for forcing said plunger in a direction to send fuel to the cylinder, a spring. engaging said plunger for retracting it and holding it in engagement with said slide, and manually operated means for reciprocating said slide independently of said cam.

2. In an internal combustion engine, the combination, witli' the engine cylinder, of a shaft rotating in proportion to the speed of the engine, a cam rigidly' secured to said shaft, a pump having a plunger for introducing fuel into said cylinder, a slide having a longitudinalv slot therein, said slide being operated by said cam and contacting said plunger for forcing the latter in a direction to deliver fuel to the engine cylinder, a spring for retracting said plunger and holding it in contact with the slide, and a lever having a nger projecting into said slot for engaging the slide and operating it independently of said cam, said slot being long enough to permit the slide to reciprocate under the action of the cam under normal conditions without engaging said nger,

`3. In an internal combustion engine, the combination, with the engine cylinder, of a shaft rotating in proportion to the speed of 4the engine, a cam rigidly secured to said shaft, a pump. having a plunger for introducing fuel into said cylinder, a slide having al longitudinal slot therein, said slide being operated by said cam and contacting said plunger vfor forcing the latter in a direction to deliver fuel to the engine cylinder, a spring for retracting said plunger and holding it in contact with the slide, and a 

